Because this bushing is factory-pressed and not available as a standalone part

Mechanical Protection: Securely holds elements in place to resist shifting from high-static air pressure

one set of contacts on the Heat Sequencer Time Delay Rly is dedicated to energizing the blower motor to ensure airflow before the elements reach peak temperature

The York S1-029-21121-000 Inshot Burner is a precision-engineered OEM furnace replacement part designed to direct fuel through the orifice with a venturi effect that pulls in primary air for optimal combustion

use a multimeter on the ohms setting

Armstrong Furnace R40663-002 Ignitor/Sensor Els PW 17895 Because this bushing is factory-pressedIGNITOR SENSOR, Q3300 Armstrong Furnace R40663 002 Ignitor Sensor (Q3300) OEM Flame Rod Assembly, 208 240V Upgrade and maintain your HVAC system with the genuine Armstrong Furnace R40663 002 Ignitor Sensor, a high quality OEM flame rod assembly designed for reliable ignition and flame sensing performance. Engineered specifically for Armstrong Air equipment, this component ensures efficient burner operation and safe system functionality. Key Features &